Sector Charybdis

Sector Charybdis encompasses the two Voxai planetoids, on the left of the map

Sector Charybdis (also called Sector Charyb) is one of two (named) regions in the Twilight Cage, visited by Sonic and friends during Chapter 7 of Sonic Chronicles: The Dark Brotherhood. The sector is presumably named after, or lends its name to, Prefect Charyb, an advanced Gizoid who serves as the co-commander of the Nocturnus Clan army.

Voxai territory dominates Sector Charybdis, with their twin colony planetoids Voxai Alpha and Voxai Beta being the two areas which the Cyclone can fly to in-game.